Remove old comment
Added FTDI library back, overwriting the open-usb-library
Add the FTDI library to the gradle build
Create two classes to support both CDC and FTDI devices.

Super object at UsbConnection has the factory to generate the correct usb object.
Detect if a FTDI device is connected and use the correct class to comunicate
Merge pull request #975 from arthurbenemann/usb_ftdi

Fix problems with USB libraries

Now using both the FTDI and the usbseriallibrary libraries depending on the connected device.